Manufacturer's Response - Tandberg Profile 6000 MXP
1. (Page 2) "Call Speed v Resolution Table"
Tandberg response: The call speed v resolution table is correct but incomplete. Call resolution also depends on the "motion/sharpness" call quality setting. At 1152Kbps, if set to 'motion' the codec will send w448p; set to sharpness it will send w720p.
2. (Page 5) "In any mode except full screen a significant part of the wide screen image is lost from either side of the display. This is illustrated in the full screen and 1+1 images above".
Tandberg response: A 16:9 widescreen image is cropped left and right to a 4:3 aspect ration in the screen layouts mentioned in order to make the best use of the available screen area.
3. (Page 8) "For added security; this remote management system can be password protected".
Tandberg response: The user has the option of disabling http so that only https connections are allowed. In addition, there is a command line interface via telnet or SSH. Again, the user may switch off telnet forcing the more secure option.
4. (Section D: SYSTEM OPERATION)
Tandberg response: In addition to control via IR Remote Control and web, there is the command line interface mentioned above. There is also a two-way SOAP interface for intelligent control, but this is most used with the "Integrator" package, which supplied CODEC-only with no screen and intended for custom builds and control via a room control system.
5. (Page 9) "The MXP remote includes a single presentation source button..."
Tandberg response: There is also the TRC-4 remote as an optional extra offering dedicated buttons for video source selection, FECC, etc.
6. (Page 10) "Controlling an MCU conference is a simple procedure. Pressing the “connect” button..."
Tandberg response: In addition, an incoming call can be included in an ongoing call thereby creating a multi-site conference.
7. (Section E: VIDEO TESTS) "Subjective Video Impairments - Blurring"
Tandberg response: It is not clear whether the call was set for 'motion' or 'sharpness' during the tests. The different settings would have made a difference – when jerkiness is going to be a problem, the user always has the option of favouring motion over resolution for a given bandwidth.
8. (Section F: AUDIO TESTS, Page 24) "Comments: During the evaluation we experienced variable lip sync, at times it was very good but at others it was very poor with the audio significantly ahead of the video. This effect was seen both in HD-HD connections and in HD-SD connections".
Tandberg response: This phenomenon is observed when there is congestion or contention in the network causing fragmentation of the RTP stream. The NIC in the codec makes a best guess at re-assembly of the stream but RTP is particularly susceptible to this kind of network problem. No mention is made of network configuration or whether QOS mechanisms were in place during the tests. Also, it is sometimes the case that audio and video streams are separated by the network's QOS procedures. If there is little movement in the video and/or low volume audio, the two streams can drift out of sync. They will re-establish sync in short order as soon as motion and/or speech are present again in the streams.
9. (Section I: SUMMARY)
Tandberg response: The following features have not been mentioned in the summary:
- SOAP / XML interface mentioned above.
- SNMP management: a management system may monitor the CODEC for health and status via the TANDBERG MIB. Traps can also be sent to a suitable SNMP trap host.
- SIP: The 6000 is a multi stack CODEC capable of H.320, H.323 and SIP. Further, the multi-site capability can join calls made over all 3 protocols in the same conference.
- IPLR: TANDBERG's Intelligent Packet Loss Recovery technology allows the system to recover from network problems by dynamically re-negotiating call speeds in the event of high jitter and packet loss.
Back to Product Evaluations.